DS004809: ieeg dataset, 252 subjects#
Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories
Citation: Haydn G. Herrema, Michael J. Kahana (—). Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories. 10.18112/openneuro.ds004809.v2.2.0
252-participant iEEG dataset — Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories.
Quickstart#
Install
pip install eegdash
Access the data
from eegdash.dataset import DS004809
dataset = DS004809(cache_dir="./data")
# Get the raw object of the first recording
raw = dataset.datasets[0].raw
print(raw.info)
Filter by subject
dataset = DS004809(cache_dir="./data", subject="01")
Advanced query
dataset = DS004809(
cache_dir="./data",
query={"subject": {"$in": ["01", "02"]}},
)
Iterate recordings
for rec in dataset:
print(rec.subject, rec.raw.info['sfreq'])
If you use this dataset in your research, please cite the original authors.
BibTeX
@dataset{ds004809,
title = {Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories},
author = {Haydn G. Herrema and Michael J. Kahana},
doi = {10.18112/openneuro.ds004809.v2.2.0},
url = {https://doi.org/10.18112/openneuro.ds004809.v2.2.0},
}
About This Dataset#
This dataset contains behavioral events and intracranial electrophysiological recordings from a categorized free recall task. The experiment consists of participants studying a list of words, presented visually one at a time, completing simple arithmetic problems that function as a distractor, and then freely recalling the words from the just-presented list in any order. The data was collected at clinical sites across the country as part of a collaboration with the Computational Memory Lab at the University of Pennsylvania.
Unique to this paradigm is the semantic construction of the word lists. Each word comes from one of 25 semantic categories, and each list of 12 items contains 6 pairs of same-category words from 3 different categories. This means that each list has 4 words from 3 semantic categories, and in each half of the list there will be 1 pair of words from each category. For example, if a list contains words from categories A, B, and C, a possible list construction would be:
A1 - A2 - B1 - B2 - C1 - C2 - A3 - A4 - C3 - C4 - B3 - B4
Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories
Description
To Note
* The iEEG recordings are labeled either “monopolar” or “bipolar.” The monopolar recordings are referenced (typically a mastoid reference), but should always be re-referenced before analysis. The bipolar recordings are referenced according to a paired scheme indicated by the accompanying bipolar channels tables. * Each subject has a unique montage of electrode locations. MNI and Talairach coordinates are provided when available, along with brain region annotations. * Recordings were made on multiple different systems, so we have done the scaling to provide all voltage values in V.
Contact
For questions or inquiries, please contact sas-kahana-sysadmin@sas.upenn.edu.
Cohort#
Dataset Statistics#
Age distribution by gender (n=248, range 18–65 yr, mean 36.8 yr)
Sex composition
Channel counts (ch)
Sampling frequencies (Hz)
Total recording duration: 575 h
Signal · Electrodes & live trace#
Live trace viewer — sub-R1376D · ses-0 · task-catFR1
Showing one representative recording out of
252 subjects and 889 recordings in this dataset.
Browse the full set on OpenNeuro;
drop any other _ieeg.{set,edf,bdf,vhdr} file onto the
viewer (or pass ?ieeg=<url>) to inspect it.
Electrode layout — iEEG · 139 sensors — 139 channels
NEMAR Processing Statistics#
The plots below are generated by NEMAR’s automated EEG pipeline. The histogram shows pipeline success for data cleaning and ICA decomposition, the percentage of data frames and EEG channels retained after artefact removal, line noise per channel (RMS, dB), and the age/gender distribution of participants.
HED event descriptors word cloud
Manifest#
File Explorer#
Browse the BIDS file structure of this dataset. Records are fetched on demand from the EEGDash catalog the first time you open the explorer.
Full dataset metadata table
Dataset ID |
|
Title |
Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories |
Author (year) |
|
Canonical |
— |
Importable as |
|
Year |
— |
Authors |
Haydn G. Herrema, Michael J. Kahana |
License |
CC0 |
Citation / DOI |
|
Source links |
OpenNeuro | NeMAR | Source URL |
Copy-paste BibTeX
@dataset{ds004809,
title = {Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories},
author = {Haydn G. Herrema and Michael J. Kahana},
doi = {10.18112/openneuro.ds004809.v2.2.0},
url = {https://doi.org/10.18112/openneuro.ds004809.v2.2.0},
}
API Reference#
eegdash.datasetEEGDashDatasetDS004809 · Herrema2023_Categorized_Free_Recalleegdash/dataset/registry.py · [source ↗]- class eegdash.dataset.DS004809(cache_dir: str, query: dict | None = None, s3_bucket: str | None = None, **kwargs)[source]#
Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories
- Study:
ds004809(OpenNeuro)- Author (year):
Herrema2023_Categorized_Free_Recall- Canonical:
—
Also importable as:
DS004809,Herrema2023_Categorized_Free_Recall.Modality:
ieeg; Experiment type:Memory; Subject type:Epilepsy. Subjects: 252; recordings: 889; tasks: 1.- Parameters:
cache_dir (str | Path) – Directory where data are cached locally.
query (dict | None) – Additional MongoDB-style filters to AND with the dataset selection. Must not contain the key
dataset.s3_bucket (str | None) – Base S3 bucket used to locate the data.
**kwargs (dict) – Additional keyword arguments forwarded to
EEGDashDataset.
- data_dir#
Local dataset cache directory (
cache_dir / dataset_id).- Type:
Path
Notes
Each item is a recording; recording-level metadata are available via
dataset.description.querysupports MongoDB-style filters on fields inALLOWED_QUERY_FIELDSand is combined with the dataset filter. Dataset-specific caveats are not provided in the summary metadata.References
OpenNeuro dataset: https://openneuro.org/datasets/ds004809 NeMAR dataset: https://nemar.org/dataexplorer/detail?dataset_id=ds004809 DOI: https://doi.org/10.18112/openneuro.ds004809.v2.2.0 NEMAR citation count: 1
Examples
>>> from eegdash.dataset import DS004809 >>> dataset = DS004809(cache_dir="./data") >>> recording = dataset[0] >>> raw = recording.load()
- __init__(cache_dir: str, query: dict | None = None, s3_bucket: str | None = None, **kwargs)[source]#
- save(path: str, overwrite: bool = False, offset: int = 0)[source]#
Save datasets to files by creating one subdirectory for each dataset:
path/ 0/ 0-raw.fif | 0-epo.fif description.json raw_preproc_kwargs.json (if raws were preprocessed) window_kwargs.json (if this is a windowed dataset) window_preproc_kwargs.json (if windows were preprocessed) target_name.json (if target_name is not None and dataset is raw) 1/ 1-raw.fif | 1-epo.fif description.json raw_preproc_kwargs.json (if raws were preprocessed) window_kwargs.json (if this is a windowed dataset) window_preproc_kwargs.json (if windows were preprocessed) target_name.json (if target_name is not None and dataset is raw)
- Parameters:
path (str) –
- Directory in which subdirectories are created to store
-raw.fif | -epo.fif and .json files to.
overwrite (bool) – Whether to delete old subdirectories that will be saved to in this call.
offset (int) – If provided, the integer is added to the id of the dataset in the concat. This is useful in the setting of very large datasets, where one dataset has to be processed and saved at a time to account for its original position.
BaseDataset from braindecode — windowed via create_windows_from_events.braindecodeDataLoader; supports parallel workers and on-the-fly augmentations.pytorchdatasets.load_dataset("EEGDash/ds004809").huggingface
Find datasets with the EEGDash APIQuery the catalogue, filter by task or modality, list candidates.
Load one EEG recordingResolve a single record to an MNE Raw with channels and events.
EEG recording to PyTorch DataLoaderWrap braindecode windows in a DataLoader for model training.
Preprocess EEG and create windowsFilter, resample, epoch — and persist the windowed dataset.
Save and reload prepared dataCache a windowed dataset to disk and reattach it without recompute.
Download a dataset locallyPrefetch BIDS files to a local cache and validate the layout.Swap any load_dataset(...) call for ds004809 to reproduce the tutorial on this dataset.
Citation
Haydn G. Herrema, Michael J. Kahana (n.d.). Categorized Free Recall: Delayed Free Recall of Word Lists Organized by Semantic Categories. 10.18112/openneuro.ds004809.v2.2.0
Provenance
¹Contributed to openneuro in BIDS format.
²Curated & ingested by the EEGDash catalog; see CITATION.cff for canonical reference.
³Persistent identifier: 10.18112/openneuro.ds004809.v2.2.0.
Related & sibling datasets
+ 1 more — see See Also below →
See Also#
eegdash.dataset.EEGDashDataseteegdash.dataset